segfault in dynamic_demo.py

When running examples/dynamic_demo I get a segfault with the following
backtrace. Does anyone have any thoughts on what might be causing
this? I'm using python 2.4 .4c1 and the latest svn version of
mpl/numpy/scipy.

Cheers,

Tim

#0 0x00000000004be54f in PyFrame_New ()
#1 0x0000000000476004 in PyEval_EvalCodeEx ()
#2 0x00000000004bf233 in PyClassMethod_New ()
#3 0x0000000000413bf0 in PyObject_Call ()
#4 0x000000000046faf1 in PyEval_CallObjectWithKeywords ()
#5 0x00002b041ffb412f in init_gobject () from
/var/lib/python-support/python2.4/gtk-2.0/gobject/_gobject.so
#6 0x00002b042035218b in g_source_get_current_time () from
/usr/lib/libglib-2.0.so.0
#7 0x00002b0420351c84 in g_main_context_dispatch () from
/usr/lib/libglib-2.0.so.0
#8 0x00002b0420354acd in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#9 0x00002b0420354dda in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#10 0x00002b0420a645f3 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#11 0x00002b04295fb601 in wxEventLoop::Run () from
/usr/lib/libwx_gtk2u_core-2.6.so.0
#12 0x00002b042968411b in wxAppBase::MainLoop () from
/usr/lib/libwx_gtk2u_core-2.6.so.0
#13 0x00002b0428c88487 in wxPyApp::MainLoop () from
/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core_.so
#14 0x00002b0428ce928f in wxPyFileSystemHandler::FindFirst ()
   from /usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core_.so
#15 0x0000000000413bf0 in PyObject_Call ()
#16 0x0000000000473fd0 in PyEval_EvalFrame ()
#17 0x00000000004767d6 in PyEval_EvalCodeEx ()
#18 0x00000000004bf233 in PyClassMethod_New ()
#19 0x0000000000413bf0 in PyObject_Call ()
#20 0x0000000000419930 in PyClass_IsSubclass ()
#21 0x0000000000413bf0 in PyObject_Call ()
#22 0x0000000000472619 in PyEval_EvalFrame ()
#23 0x0000000000475546 in PyEval_EvalFrame ()
#24 0x00000000004767d6 in PyEval_EvalCodeEx ()
#25 0x0000000000474a5a in PyEval_EvalFrame ()
#26 0x00000000004767d6 in PyEval_EvalCodeEx ()
#27 0x0000000000476882 in PyEval_EvalCode ()
#28 0x000000000049b1e2 in PyRun_FileExFlags ()
#29 0x000000000049b3e0 in PyRun_SimpleFileExFlags ()
#30 0x0000000000410b9a in Py_Main ()
#31 0x00002b041fd400c4 in __libc_start_main () from /lib/libc.so.6
#32 0x0000000000410079 in _start ()